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CET Electric Technology
4.5.2 Flexible Configuration for 2-Ø and 3-Ø SM Grouping
PMC-592 with Firmware V1.00.06 or later supports the flexible configuration for 2-Ø and 3-Ø SM
grouping. Previously, the 2-Ø and 3-Ø SM assignment principle follows a fixed sequence that is not
programmable so only adjacent circuits that are in a certain order are automatically configured as 2-Ø
and 3-Ø SMs by default. For example, 3-Ø SMs were automatically configured based on the following
grouping of 1-Ø SMs: [1,2,3], [4,5,6], [7,8,9], [10,11,12], [13,14,15], [16,17,18] and [19,20,21]. Therefore,
it is extremely important to allocate the 2-Ø and 3-Ø circuits during installation that meet this fixed and
inflexible assignment principle. If a 3-Ø circuit is installed with SM6, SM7 and SM8, it will be impossible
for the PMC-592 with Firmware V1.00.05 or earlier to provide 3-Ø SM readings because the wiring does
not follow the pre-determined 3-Ø SM grouping. The only way to solve this problem would be with
Virtual Meters (VM). However, if there are many similar assignment mistakes in a single PMC-592, there
would not be enough VMs to solve all the wiring problem. Firmware V1.00.06 or later solves this
dilemma by supporting the flexible grouping of any 1-Ø SMs as 2-Ø or 3-Ø SMs.
The following provides guidelines on how to customize 2-Ø and 3-Ø SMs via the built-in web.
1.
Login the Web.
2.
Click on
Branch Setup
on the left-hand.
3.
Configure
CT Strip Installation, Direction, CT Phase, CT Type, CT Polarity
and
CT Ratio
in
batches by editing areas with red rectangle. Users can also configure
CT Phase, CT Type, CT
Polarity, CT Ratio
and
Label
for every 1-Ø SM. Click
Submit
to save your changes.
Figure 4-39 Branch Setup page
4.
Click
Advanced Setup
to customize 2-Ø and 3-Ø SMs based on the actual wiring for your 2-Ø
and 3-Ø circuits. Click
Submit
to save your changes.
Figure 4-40 Custom SM pages